The firm is insisting that the home of the deep-fried dish – the Carron Fish Bar in Stonehaven, Aberdeenshire – publishes a disclaimer at the end of its menu to distance the manufacturer from the product.

Flagship product

A spokeswoman for Mars told FoodManufacture.co.uk: “We are really flattered that customers ofCarron Fish Bar like our product so much that it has now become a flagship product for the store.”